package com.hca.training.zk.javabasic.Stringtest.Stringtest;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CalendarTest {
    public static void main(String[] arg0){

        try {
            differentDays("2018-06-28","2018-11-05" +
                    "");
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
    public static int differentDays(String da1, String da2) throws ParseException {
        DateFormat  formatter = new SimpleDateFormat("yyyy-MM-dd");

        Date date1=formatter.parse(da1);
        Date date2=formatter.parse(da2);
        Calendar cal1 = Calendar.getInstance();
        cal1.setTime(date1);

        Calendar cal2 = Calendar.getInstance();
        cal2.setTime(date2);
        int day1= cal1.get(Calendar.DAY_OF_YEAR);
        int day2 = cal2.get(Calendar.DAY_OF_YEAR);

        int year1 = cal1.get(Calendar.YEAR);
        int year2 = cal2.get(Calendar.YEAR);
        if(year1 != year2)   //同一年
        {
            int timeDistance = 0 ;
            for(int i = year1 ; i < year2 ; i ++)
            {
                if(i%4==0 && i%100!=0 || i%400==0)    //闰年
                {
                    timeDistance += 366;
                }
                else    //不是闰年
                {
                    timeDistance += 365;
                }
            }

            return timeDistance + (day2-day1) ;
        }
        else    //不同年
        {
            System.out.println("距离岩岩生日还有: " + (day2-day1)+"天");
            return day2-day1;
        }
    }
}
